Publications of the 



GENTRYS' Life-Histories of Birds. Life-His- 

 tories of the Birds of Eastern Pennsylvania. By Thomas 

 G. Gentry. 2 vols., 12mo. cloth, $4.00. 



" Upon careful examination of Mr. Gentry's ' Life-Histories of 

 Birds,' I can pronounce it to be a very original work, full of minute 

 and precise observations upon points too often overlooked, and 

 giving much information not to be found elsewhere. I welcome it 

 as a valuable addition to the literature of my favorite branch of 

 Bcience."— Dr. Elliott Coues, Smithsonian Institution, Washington, 

 D. C. 



" His comments upon the architecture of birds, and his minute 

 lists of their fare, are especially new, valuable, and interesting. 

 It is rare that a book with a so thoroughly out-of-door odor comes 

 to us, and we predict for it a cordial welcome."— Forest and Stream. 



"I consider your 'Life-Histories of Birds of Eastern Pennsyl- 

 vania ' an exceedingly interesting work, and one valuable to the 

 ornithologist, as well as entertaining to the general reader. The 

 'bill of fare' given in the account of each species is particularly 

 valuable."— Prof. Robert Pddgivarj, Smithsonian Institution, Wash- 

 ington, D. C. 



" I shall look forward with great interest to the conclusion of the 

 work."— Pro/. J. A. Allen, Museum of Comparative Zoology, Cam- 

 bridge, Mass. 



" The considerable number of new observations included in it, 

 give it a permanent value." —Prof. E. I). Cope. 



"It is an interesting work, and I hope you will continue it."— 

 Prof. O. C Marsh, Yule College. 



" I am glad you have given so succinct an account of your obser- 

 vations. I prize the volume very highly."— Prof. N. II. Winchell, 

 Minneapolis, Minn. 



" The author's statements, for the most part, are based on his 

 own experience, and possess the merit both of precision and fresh- 

 ness. The volume is written in an attractive style, with great ful- 

 ness of description, though free from burdensome details." — N. Y. 

 Tribune. 



" The comprehensiveness of the work is wholly praiseworthy. 

 An Appendix and Indices, which partly enhance the value of the 

 work, are also furnished. To a farmer's household, for a student of 

 ornithology and oology, for all who give attention to or have inter- 

 est inthe'birds of tins part of America, the work has no equal so 

 readily obtainable.'" — Boston Traveller. 



MAMMOTH Cave and its Inhabitants. The 

 Mammoth Cave and its Inhabitants, or Descriptions of 

 the Fishes, Insects, and Crustaceans found in the Cave, 

 with figures of the various species, and an account of allied forms, 

 comprising notes upon their Structure, Development and Habits, 

 with remarks upon subterranean life in general. By A. S. Pack- 

 ard, Jr. and F. W. Putnam. 8vo ; Plates and Cuts. Cloth, $1.25. 



